surveillance
Medicine noun
Close and continued observation or monitoring of a patient or condition over time.
Instead of surgery now, we could choose active surveillance and monitor closely.
Law noun
The systematic monitoring of persons, often engaging the right to respect for private life.
The bulk surveillance programme was held to violate the right to privacy.
Business noun
Ongoing monitoring of activity to detect breaches of policy or irregular behaviour.
Continuous surveillance of user access logs flagged an accountant granting himself payment rights.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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